400207959 has 20 divisors (see below), whose sum is σ = 598545376. Its totient is φ = 266491296.

The previous prime is 400207949. The next prime is 400207967. The reversal of 400207959 is 959702004.

It is not a de Polignac number, because 400207959 - 2⁴ = 400207943 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400207909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 81282 + ... + 86064.

Almost surely, 2^400207959 is an apocalyptic number.

400207959 is a deficient number, since it is larger than the sum of its proper divisors (198337417).

400207959 is a wasteful number, since it uses less digits than its factorization.

400207959 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5828 (or 5819 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 36.

The square root of 400207959 is about 20005.1982994421. The cubic root of 400207959 is about 736.9339655240.

The spelling of 400207959 in words is "four hundred million, two hundred seven thousand, nine hundred fifty-nine".